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    How do i find out 75% of a cumulative frequency graph and answer if it is less or more than and prove that my answer is correct?
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    (Original post by EstherFatunla)
    How do i find out 75% of a cumulative frequency graph and answer if it is less or more than and prove that my answer is correct?
    Your question doesn't make much sense; if you provide a picture of the question it helps people to help you more easily.

    Also I'd recommend posting this to the Maths section of study help rather than the GCSE section - you'll get a lot more attention over there,
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    (Original post by TimGB)
    Your question doesn't make much sense; if you provide a picture of the question it helps people to help you more easily.

    Also I'd recommend posting this to the Maths section of study help rather than the GCSE section - you'll get a lot more attention over there,
    Okay thank you I will send a picture now
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    (Original post by TimGB)
    Your question doesn't make much sense; if you provide a picture of the question it helps people to help you more easily.

    Also I'd recommend posting this to the Maths section of study help rather than the GCSE section - you'll get a lot more attention over there,
    Attachment 523439523441Name:  20160417_104411.jpg
Views: 279
Size:  520.6 KB
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    Ah, ok. Draw a line up at weight = 3.4. Check where this crosses the graph. If the cumulative frequency at that point is less than 75, then she is wrong. In this case, the cumulative frequency at that point is about 57, suggesting that only 57% of the parcels have weight less than 3.4kg, not the 75% needed for her statement to be correct.

    To find the correct answer, draw a line across at cf = 75. The weight at the point where it crosses is about 5.2kg, which suggests that 75% of parcels weigh less than 5.2kg. (Not actually needed for this question, but could be useful in future questions).
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    Attachment 523455523457523460
    (Original post by TimGB)
    Ah, ok. Draw a line up at weight = 3.4. Check where this crosses the graph. If the cumulative frequency at that point is less than 75, then she is wrong. In this case, the cumulative frequency at that point is about 57, suggesting that only 57% of the parcels have weight less than 3.4kg, not the 75% needed for her statement to be correct.

    To find the correct answer, draw a line across at cf = 75. The weight at the point where it crosses is about 5.2kg, which suggests that 75% of parcels weigh less than 5.2kg. (Not actually needed for this question, but could be useful in future questions).
    Thank you so much but i have more questions to ask below:
    Name:  20160417_105504.jpg
Views: 281
Size:  509.0 KBAttachment 523455523457

    There are 18 packets of sweets and 12 boxes of sweets in a carton.
    The mean number of sweets in all the 30 packets and boxes is 14
    The mean number of sweets in all the 18 packets is 10
    Work out the mean number of sweets in the boxes
    Attached Images
      
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    (Original post by TimGB)
    Ah, ok. Draw a line up at weight = 3.4. Check where this crosses the graph. If the cumulative frequency at that point is less than 75, then she is wrong. In this case, the cumulative frequency at that point is about 57, suggesting that only 57% of the parcels have weight less than 3.4kg, not the 75% needed for her statement to be correct.

    To find the correct answer, draw a line across at cf = 75. The weight at the point where it crosses is about 5.2kg, which suggests that 75% of parcels weigh less than 5.2kg. (Not actually needed for this question, but could be useful in future questions).
    Thank you so much but i have more questions to ask below:
    Name:  20160417_105504.jpg
Views: 281
Size:  509.0 KBAttachment 523455523457Attachment 523455523457523460

    There are 18 packets of sweets and 12 boxes of sweets in a carton.
    The mean number of sweets in all the 30 packets and boxes is 14
    The mean number of sweets in all the 18 packets is 10
    Work out the mean number of sweets in the boxes
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    (Original post by EstherFatunla)
    Thank you so much but i have more questions to ask below:
    Name:  20160417_105504.jpg
Views: 281
Size:  509.0 KBAttachment 523455523457Attachment 523455523457523460

    There are 18 packets of sweets and 12 boxes of sweets in a carton.
    The mean number of sweets in all the 30 packets and boxes is 14
    The mean number of sweets in all the 18 packets is 10
    Work out the mean number of sweets in the boxes
    Answer for the first one:
    Attached Images
     
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    (Original post by EstherFatunla)
    Thank you so much but i have more questions to ask below:
    Name:  20160417_105504.jpg
Views: 281
Size:  509.0 KBAttachment 523455523457Attachment 523455523457523460

    There are 18 packets of sweets and 12 boxes of sweets in a carton.
    The mean number of sweets in all the 30 packets and boxes is 14
    The mean number of sweets in all the 18 packets is 10
    Work out the mean number of sweets in the boxes
    Answer to the second one:
    Attached Images
     
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    (Original post by TimGB)
    Answer to the second one:
    Thank you
 
 
 
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